Effects of fluctuating temperature and constant temperatures on the egg parasitoid of sunn pest, Trissolcus semistriatus (Nees) (Hymenoptera, Scelionidae)

In this thesis, a study has been carried out to determine some biological parameters of Trissolcus semistriatus (Nees) on alternative host, Graphosoma lineatum (L.) eggs at constant (25±1 ºC) and fluctuating temperatures (25-20±1 and 28-23±1 ºC), 60 ± 10% relative humidity, 14:10 photoperiod conditions in the laboratory. It was set up high temperatures as light (14 hours) and low temperatures as dark (10 hours). It was determined that the most successful results in terms of number of eggs per day, fecundity, adult life, oviposition time and development time were at 28-23 ±1 ºC fluctuating temperature conditions. However the best results of emergence and sexual ratio were obtained at 25-20 ± 1 ºC. As a result, it was concluded that temperature of 28-23 ±1 ºC was more suitable for mass production of T. semistriatus and for the first time this study has been demonstrated.